Marketed to iPod users but in no way specific to Apple products, Capdase's Dual USB Power Car Charger has two USB ports and thus promises to charge two USB-cabled devices at the same time, assuming you provide your own USB cables. Cosmetically and functionally, there's nothing special about the charger, and no guarantees are made about its ability to charge the more power-hungry iPhone.

Editors' Note: iLounge only reviews products in "final" form, but many companies now change their offerings - sometimes several times - after our reviews have been published.
This iLounge article provides more information on this practice, known as revving.